black body

简明释义

黑体

英英释义

例句

1.Astronomers often model stars as black bodies 黑体 to simplify calculations of their radiation.

天文学家通常将星星建模为黑体 黑体 以简化其辐射计算。

2.The temperature of a black body 黑体 can be determined by measuring its emitted radiation.

通过测量黑体 黑体 发出的辐射，可以确定其温度。

3.In physics, a black body 黑体 is an idealized object that emits radiation at all frequencies.

在物理学中，黑体 黑体 是一种理想化的物体，可以在所有频率下发射辐射。

4.A perfect black body 黑体 absorbs all incident radiation without reflecting any.

一个完美的黑体 黑体 吸收所有入射辐射而不反射任何光线。

5.The concept of a black body 黑体 is essential for understanding black body radiation.

理解黑体辐射 黑体 的概念对于理解黑体辐射 是至关重要的。

作文

In the world of physics, the concept of a black body is fundamental to our understanding of thermal radiation. A black body is an idealized physical object that absorbs all incoming radiation, regardless of frequency or angle of incidence. This means that a black body does not reflect or transmit any light; it simply absorbs it completely. The significance of a black body lies in its ability to emit radiation as well. According to Planck's law, a black body emits radiation in a characteristic spectrum that depends solely on its temperature. This property makes the black body a perfect emitter and a perfect absorber, which is crucial for various applications in physics and engineering.The study of black bodies dates back to the early 20th century when physicists were trying to understand the nature of electromagnetic radiation. Max Planck introduced the idea of quantized energy levels to explain the spectrum of radiation emitted by a black body. His work laid the foundation for quantum mechanics, revolutionizing our understanding of atomic and subatomic processes. The black body model also led to the development of the Stefan-Boltzmann law, which states that the total energy radiated per unit surface area of a black body is proportional to the fourth power of its absolute temperature.Real-world objects do not behave like perfect black bodies, but many materials approximate this behavior under certain conditions. For instance, a piece of charcoal or a black-painted surface can be considered a good approximation of a black body because they absorb most of the visible light that hits them. Understanding how these materials interact with radiation helps scientists and engineers design better thermal systems, such as solar panels, radiators, and insulation materials.Moreover, the concept of a black body has implications beyond just thermal radiation. It plays a critical role in astrophysics, where stars are often modeled as black bodies to analyze their emitted spectra. By studying the light from stars, astronomers can determine their temperatures, compositions, and distances from Earth. This information is vital for understanding the universe and our place within it.In conclusion, the concept of a black body is essential in the fields of physics and engineering. It serves as a theoretical benchmark for understanding thermal radiation and has led to significant advancements in science. Although real materials cannot perfectly replicate a black body, approximations allow us to harness the principles derived from this concept for practical applications. As we continue to explore the mysteries of the universe, the black body remains a key element in our quest for knowledge about the nature of light and heat.

在物理学的世界中，黑体的概念对于我们理解热辐射至关重要。黑体是一个理想化的物理对象，它能够吸收所有入射辐射，无论频率或入射角度。这意味着黑体不会反射或透射任何光；它只是完全吸收光线。黑体的重要性在于它也能够发射辐射。根据普朗克定律，黑体发射的辐射具有特征光谱，这仅取决于其温度。这一特性使得黑体成为完美的发射体和完美的吸收体，这对物理和工程中的各种应用至关重要。对黑体的研究可以追溯到20世纪初，当时物理学家试图理解电磁辐射的性质。马克斯·普朗克提出了量子能级的概念，以解释黑体发射的辐射谱。他的工作为量子力学奠定了基础，彻底改变了我们对原子和亚原子过程的理解。黑体模型还导致了斯特藩-玻尔兹曼定律的发展，该定律指出，每单位表面积的黑体辐射的总能量与其绝对温度的四次方成正比。现实世界中的物体并不完全像完美的黑体那样行为，但许多材料在某些条件下接近这种行为。例如，一块木炭或一个黑色涂漆的表面可以被视为良好的黑体近似，因为它们吸收大部分照射到它们身上的可见光。理解这些材料与辐射的相互作用帮助科学家和工程师设计更好的热系统，如太阳能电池板、散热器和绝缘材料。此外，黑体的概念在天体物理学中也有影响，恒星通常被建模为黑体以分析其发射的光谱。通过研究来自恒星的光，天文学家可以确定它们的温度、成分和与地球的距离。这些信息对理解宇宙及我们在其中的位置至关重要。总之，黑体的概念在物理和工程领域中是必不可少的。它作为理解热辐射的理论基准，并促进了科学的重大进展。尽管现实材料无法完美复制黑体，但近似值使我们能够利用从这一概念衍生的原理进行实际应用。当我们继续探索宇宙的奥秘时，黑体仍然是我们追求光和热的本质知识的关键元素。